Midi instrument sound

Hey guys,
I was wondering are there ways I could make midi sounds better?
At the moment, I am inputting values of RGB (depending on the images/colours) to makenote, noteout, pgmout (to choose different instrument)..
However, let’s say Cello, it doesn’t very good or let’s say I don’t know violin..
How do I get like a cello sounds like this…

-- Pasted Max Patch, click to expand. --

Copy all of the following text. Then, in Max, select New From Clipboard.

I like to use the midi sounds that come with Logic. Just double-click the [noteout] object and choose "From Max 1" now logic (or another program) will read Max like any midi instrument. You can use any sounds you want this way.